title: White emission of Yb²⁺:fluoride glasses efficiently excited with near-UV light.
abstract: Various Yb²⁺-containing fluoride glasses melting under a reductive atmosphere were prepared. The brightest white light emission was observed for an AlF₃-based fluoride glass not containing Hf or Zr. The largest full width at half maximum of the white emission spectra was 202 nm. In addition, incorporation of chloride into the AlF₃-based glass enabled efficient excitation with near-ultraviolet light corresponding to a GaN bandgap of 3.4 eV and the maximum internal quantum efficiency of Yb²⁺: AlF₃-based fluoride glass was 42%.
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Okamoto
authors.forename: Ken
authors.initials: K
authors.lastname: Kasuga
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Kubota
authors.forename: Natsuya
authors.initials: N
authors.lastname: Nishimura
authors.forename: Hiromi
authors.initials: H
authors.lastname: Kawamoto
authors.forename: Koichi
authors.initials: K
authors.lastname: Miyauchi
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Shimotsuma
authors.forename: Kiyotaka
authors.initials: K
authors.lastname: Miura